复合配筋混凝土预制方桩轴压性能试验研究

发布时间：2018-04-28 19:12

本文选题：复合配筋混凝土预制方桩 + 轴压试验　；参考：《建筑结构学报》2017年10期

【摘要】：通过对3种常用桩型共9根复合配筋混凝土预制方桩进行轴压性能试验,对比分析了部分预应力和非预应力混凝土预制方桩轴压承载力、变形能力及破坏特征等,并将得到的轴压承载力试验值与不同规范的桩身轴压承载力公式计算值进行对比。结果表明:复合配筋混凝土预制方桩轴压试验出现了轴压破坏和局压破坏两种破坏模式;破坏前,同桩型方桩试件抗压刚度基本相同,且无减小趋势;复合配筋混凝土预制方桩轴压承载力试验值仅满足GB 50007—2011《建筑地基基础设计规范》的要求,普遍小于非预应力混凝土预制方桩的轴压承载力,为此,复合配筋混凝土预制方桩轴压承载力建议采用GB 50007—2011中公式进行计算。
[Abstract]:In this paper, the axial compression capacity, deformation capacity and failure characteristics of prefabricated concrete square piles with partial prestress and non-prestressed concrete are compared and analyzed by means of axial compression tests of 9 composite reinforced concrete prefabricated square piles of three kinds of commonly used piles, and the axial compression capacity, deformation capacity and failure characteristics of prefabricated concrete square piles are compared and analyzed. The experimental values of bearing capacity under axial compression are compared with the calculated values of axial bearing capacity formula of pile body under different specifications. The results show that there are two failure modes in axial compression test of composite reinforced concrete prefabricated square piles: axial compression failure and partial compression failure, and the compressive stiffness of the specimens of the same square piles is basically the same before the failure, and there is no decreasing trend. The test value of axial compression capacity of composite reinforced concrete precast square piles only meets the requirements of GB 50007-2011, which is generally smaller than that of non-prestressed concrete precast square piles. The bearing capacity of composite reinforced concrete precast square pile is calculated by the formula of GB 50007-2011.
【作者单位】：浙江大学建筑设计研究院有限公司;浙江大学结构工程研究所;
【基金】：国家自然科学基金项目(51479176,51009122)
【分类号】：TU473.16

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